Flexible bulk bags, also known as big bags or ton bags, are soft, foldable packaging containers made from collapsible coated fabric, resin processed fabric, and other soft materials. They are large-volume transport bags. Typically, they are made primarily from polypropylene or polyethylene, which is extruded into film, cut, drawn into fibers, and then woven, cut, and stitched together.

Palletized bags are not only conducive to improving loading and unloading efficiency but are particularly suitable for packaging bulk powdery and granular goods. They promote the standardization and serialization of bulk packaging, reduce transportation costs, and also offer advantages such as ease of packaging, storage, and low cost. Flexible palletized bags are especially suitable for mechanized operations and are an ideal choice for warehousing, packaging, and transportation. They are widely used for packaging bulk materials like cement, salt, sugar, chemical raw materials, and ore in road, rail, and sea transportation. Therefore, in recent years, flexible palletized bags have been extensively adopted worldwide for transporting powdery and granular goods. The introduction and use of palletized bags represent a qualitative revolution in the transportation of powdery and granular goods.